LOINCActiveBoth

LOINC Code 17039-9: La Crosse virus IgM (S) [Titer]

17039-9 is a LOINC code used to identify La Crosse virus IgM (S) [Titer] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component La Crosse virus Ab.IgM. It is commonly used with the system or sample type Ser.

Reviewed by HealthAssure Clinical TeamUpdated 25 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component La Crosse virus Ab.IgM. It is commonly used with the system or sample type Ser.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Both

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • La Crosse virus IgM Ab [Titer] in Serum
  • La Crosse virus Ab.IgM
  • California encphalitis virus has more than 20 strains- most of which include "strain" in the name, One of these, La Crosse vIrus, has a name that does not signal that it is a strain of California encephalitis.
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; California Encephalitis Virus; Dilution factor; Dilution Factor (Titer); ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; Lacrosse virus; LACV; Microbiology; Point in time; Random; Serum; SmQn; SR; Titer; Titered; Titre; Ttr

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

La Crosse virus IgM (S) [Titer]La Crosse virus IgM Ab [Titer] in SerumLACV IgM Titr SerLa Crosse virus Ab.IgMMICROLa Crosse virus IgM antibody, BloodTitr

Frequently asked questions

Code details

Code17039-9
SystemLOINC
Display nameLa Crosse virus IgM (S) [Titer]
DescriptionLa Crosse virus Ab.IgM
Short nameLACV IgM Titr Ser
ComponentLa Crosse virus Ab.IgM
PropertyTitr
TimingPt
System (specimen)Ser
ScaleSemiQn
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.75

Consumer names

La Crosse virus IgM antibody, Blood

Part names

LA Crosse virus Ab.IgMTitrPtSerSemiQnLa Crosse virus IgMTiterPoint in time (spot)Serum

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 17039-9 | HealthAssure